package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.annotations.Insert;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper UserMapper;
    @Autowired
    private WorkspaceService workspaceService;
    @Override
    public TurnoverReportVO getTurnoverStatistic(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end的每一天的营业额
        List<LocalDate> dateList =new ArrayList<>();
        dateList.add(begin);
        //获取begin到end的每一天
        while (!begin.isEqual(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList=new ArrayList<>();
        //获取每一天的营业额
        for (LocalDate date : dateList) {
            //营业额是状态为已完成的订单金额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover= turnover==null?0:turnover;
            turnoverList.add(turnover);
        }


        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistic(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.isEqual(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的新增用户数量
        ArrayList<Integer> newUserList = new ArrayList<>();
        //存放每天总用户量
        ArrayList<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("end",endTime);
            Integer totalUser = UserMapper.countByMap(map);

            map.put("begin",beginTime);
            Integer newUser = UserMapper.countByMap(map);
            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }
        return UserReportVO.builder().dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,",")).build();
    }

    @Override
    public OrderReportVO getOrdersStatistic(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.isEqual(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的有效订单数量
        ArrayList<Integer> validOrderList = new ArrayList<>();
        //存放每天的总订单数量
        ArrayList<Integer> orderCountList = new ArrayList<>();
        //遍历dateList集合，查询每天的有效的订单数量
        for (LocalDate date : dateList) {
            //查询每天的订单总数
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);
            //查询每天的有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validOrderList.add(validOrderCount);
            orderCountList.add(orderCount);
        }
        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单总数量
        Integer validOrderCount = validOrderList.stream().reduce(Integer::sum).get();
        //计算订单完成率
        Double orderRate = 0.0;
        if (totalOrderCount!=0){
            orderRate = validOrderCount.doubleValue()/totalOrderCount.doubleValue();
        }
        OrderReportVO reportVO= OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderRate)
                .build();
        return reportVO;
    }


    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10=orderMapper.getSalesTop10(beginTime,endTime);
        List<String> names=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList=StringUtils.join(names,",");

        List<Integer> numbers=salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList=StringUtils.join(numbers,",");

        return SalesTop10ReportVO
                .builder().nameList(nameList)
                .numberList(numberList)
                .build();
    }

    @SneakyThrows
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取营业数据
        LocalDate dateBegin=LocalDate.now().minusDays(30);
        LocalDate dateEnd=LocalDate.now().minusDays(1);
        //查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of
                (dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //通过POI将数据写入到excel中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        XSSFWorkbook excel = new XSSFWorkbook(in);
        //填充数据
        XSSFSheet sheet1 = excel.getSheet("Sheet1");
        sheet1.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"~"+dateEnd);
        XSSFRow row = sheet1.getRow(3);
        row.getCell(2).setCellValue(businessData.getTurnover());
        row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
        row.getCell(6).setCellValue(businessData.getNewUsers());
        row = sheet1.getRow(4);
        row.getCell(2).setCellValue(businessData.getValidOrderCount());
        row.getCell(4).setCellValue(businessData.getUnitPrice());

        //填充明显数据
        for (int i = 0; i <30; i++) {
            LocalDate date = dateBegin.plusDays(i);
            workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN),
                    LocalDateTime.of(date, LocalTime.MAX));
            row = sheet1.getRow(i+7);
            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(3).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessData.getUnitPrice());
            row.getCell(6).setCellValue(businessData.getNewUsers());
        }
        // 下载到浏览器
        ServletOutputStream out = response.getOutputStream();
        excel.write(out);
        out.flush();
        out.close();
        excel.close();
    }
}
